The lateral hypothalamus signals an animal to start eating, whereas the <span>ventromedial </span>hypothalamus signals the animal to stop eating. So the correct option is the first one.
To prevent blood flowing back after each heartbeat. They ensure that the blood flows only in one direction (back to the heart).
They need energy to produce oxygen
The Anti-diuretic Hormone helps to control blood pressure by acting on the kidneys and the blood vessels. Its most important role is to conserve the fluid volume of your body by reducing the amount of water passed out in the urine. And so in times of dehydration it could help your body save more water. I think the statement is correct.
In the outer shell. So, A the outer level.
I hope that this helps.